implications of len spec change

R=r
CC=golang-dev
https://golang.org/cl/1712048

src/pkg/os/dir_darwin.go

@@ -58,7 +58,7 @@ func (file *File) Readdirnames(count int) (names []string, err Error) {
 			if dirent.Ino == 0 { // File absent in directory.
 				continue
 			}
-			bytes := (*[len(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+			bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
 			var name = string(bytes[0:dirent.Namlen])
 			if name == "." || name == ".." { // Useless names
 				continue

src/pkg/os/dir_freebsd.go

@@ -53,7 +53,7 @@ func (file *File) Readdirnames(count int) (names []string, err Error) {
 			if dirent.Fileno == 0 { // File absent in directory.
 				continue
 			}
-			bytes := (*[len(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+			bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
 			var name = string(bytes[0:dirent.Namlen])
 			if name == "." || name == ".." { // Useless names
 				continue

src/pkg/os/dir_linux.go

@@ -56,7 +56,7 @@ func (file *File) Readdirnames(count int) (names []string, err Error) {
 			if dirent.Ino == 0 { // File absent in directory.
 				continue
 			}
-			bytes := (*[len(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+			bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
 			var name = string(bytes[0:clen(bytes[0:])])
 			if name == "." || name == ".." { // Useless names
 				continue

src/pkg/os/dir_nacl.go

@@ -56,7 +56,7 @@ func (file *File) Readdirnames(count int) (names []string, err Error) {
 			if dirent.Ino == 0 { // File absent in directory.
 				continue
 			}
-			bytes := (*[len(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
+			bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
 			var name = string(bytes[0:clen(bytes)])
 			if name == "." || name == ".." { // Useless names
 				continue

src/pkg/syscall/syscall_bsd.go

@@ -239,8 +239,8 @@ func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, int) {
 				break
 			}
 		}
-		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))
-		sa.Name = string(bytes[0:n])
+		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		sa.Name = string(bytes)
 		return sa, 0
 
 	case AF_INET:

src/pkg/syscall/syscall_linux.go

@@ -284,8 +284,8 @@ func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, int) {
 		for n < len(pp.Path) && pp.Path[n] != 0 {
 			n++
 		}
-		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))
-		sa.Name = string(bytes[0:n])
+		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		sa.Name = string(bytes)
 		return sa, 0
 
 	case AF_INET: